CN114989526A - Polypropylene composite material and preparation method and application thereof - Google Patents
Polypropylene composite material and preparation method and application thereof Download PDFInfo
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- CN114989526A CN114989526A CN202210368577.2A CN202210368577A CN114989526A CN 114989526 A CN114989526 A CN 114989526A CN 202210368577 A CN202210368577 A CN 202210368577A CN 114989526 A CN114989526 A CN 114989526A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 54
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 53
- -1 Polypropylene Polymers 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 7
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 7
- 239000002667 nucleating agent Substances 0.000 claims abstract description 7
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 19
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 8
- 239000005977 Ethylene Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 6
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 4
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims 2
- 238000012661 block copolymerization Methods 0.000 claims 1
- 238000007334 copolymerization reaction Methods 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- YQEMORVAKMFKLG-UHFFFAOYSA-N glycerine monostearate Natural products CCCCCCCCCCCCCCCCCC(=O)OC(CO)CO YQEMORVAKMFKLG-UHFFFAOYSA-N 0.000 description 2
- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- VKJLYEDTHCTCOH-UHFFFAOYSA-N 3-(3-octadecoxy-3-oxopropyl)sulfanylpropanoic acid Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(O)=O VKJLYEDTHCTCOH-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 229920007019 PC/ABS Polymers 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a polypropylene composite material and a preparation method and application thereof. The polypropylene composite material comprises the following components or a reaction product of the following components in percentage by mass: 76.85-99.57% of polypropylene resin; 0 to 15 percent of ultra-low density linear low density polyethylene; 0.01 to 0.05 percent of antioxidant; 0.02 to 0.1 percent of nucleating agent; 0.3 to 5 percent of light diffusant; 0.1 to 3 percent of other additives. The polypropylene composite material has the advantages of low glossiness, high rigidity, high impact resistance and low shrinkage rate, keeps good mechanical properties, particularly has good low-temperature toughness, and can meet the requirements of high performance and low gloss of automobile parts.
Description
Technical Field
The invention belongs to the technical field of polymer modified plastics, and relates to a polypropylene composite material, and a preparation method and application thereof.
Background
With the rapid development of the automobile industry in recent years, polypropylene materials, as a cheap, light and widely available polypropylene material with good processability, are gradually and widely applied to automobile materials, and particularly, in the aspect of automobile interior materials, parts including instrument panels, door panels, upright posts, seats and the like are basically prepared from polypropylene composite materials. As an automobile instrument panel bearing the safety performance of the driving side, parts such as an airbag, a directional control system, instruments, an air conditioning and sound system and the like are integrated, and the automobile instrument panel is complex in structure and is required to have high strength, high rigidity and high impact resistance. Particularly, when the automobile is impacted by the outside, obvious cracks or sharp fragments cannot be generated, and the safety of drivers and passengers is protected as much as possible. Therefore, the material has certain requirements on strength, rigidity and toughness, good dimensional stability, proper decoration performance and the like. At present, the instrument panel is mainly divided into an injection molding hard-plastic instrument panel, a vacuum plastic-absorbing molding soft/hard instrument panel and a slush molding foaming molding instrument panel. Due to the rising price of raw materials and the increasing cost and pressure of automobile materials, the demands of various automobile host factories on vacuum forming soft/hard instrument panels are gradually increased. Because the instrument panel is over against the driver, if the gloss of the smooth surface of the instrument panel is higher, the instrument panel can have stronger light reflection, and the sight safety of the driver is influenced.
At present, the instrument panel materials are mainly divided into two types, one type is the instrument panel body which adopts a PC/ABS or glass fiber reinforced polypropylene material as a body framework, and thermoplastic elastomer, thermoplastic polyurethane or PVC is slush-molded and foamed on the surface of the framework to form a sandwich structure; however, such instrument panels are expensive due to the complex process and are only used in some slightly higher end cars: the other type is a soft/hard instrument board body which is directly formed by vacuum forming by adopting a polypropylene composite material; the instrument board has the advantages of simple process, simple and convenient operation and low cost, and the requirement in the automobile instrument board is increasingly greater.
The conventional hard plastic instrument panel mainly adopts inorganic filler and toughening agent to fill modified polypropylene, and the obtained polypropylene material can obtain ideal normal temperature property. However, under low temperature conditions, especially under the limit conditions of-30 ℃ and even-40 ℃, etc., the higher glass transition temperature of the polypropylene material determines that the low temperature impact resistance is poor, and can only be improved by adding a higher content of the extender elastomer, but at the same time, the strength and rigidity of the material are reduced, the shrinkage rate is increased, and other requirements in use cannot be met, such as material rigidity, and the polypropylene material cannot be matched with other parts due to the increased shrinkage rate during installation.
Related patents have studied this, such as CN102807703B, which reduces the gloss of the composite material by adding fully vulcanized powdered rubber, grafted polypropylene and silica to the polypropylene composite material, but the gloss reduction is limited and affects the mechanical properties of the composite material.
CN102558734A improves the gloss of the material by adding powdered nitrile rubber, grafted polypropylene and silica into the composite material, but the properties of the material are affected.
Therefore, the development of low-gloss, high-impact, high-rigidity, and low-shrinkage interior materials is one of the major development directions in the automobile industry.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel polypropylene composite material which has the advantages of low gloss, high rigidity, high impact resistance and low shrinkage and has wide application prospect in automotive interior.
The invention provides a polypropylene composite material, which comprises the following components or a reaction product of the following components in percentage by mass:
according to some embodiments of the composite material of the present invention, preferably, the mass percentages of the substances are:
according to some embodiments of the composite material of the present invention, preferably, the polypropylene resin has a melt index of 0.1-2.0 g/10min at 230 ℃ under 2.16 kg. The test method is determined according to the national standard GB/T3682.1-2018.
According to some embodiments of the composite material of the present invention, preferably, the polypropylene resin is selected from at least one of homo polypropylene, random copolymer polypropylene, and block copolymer polypropylene.
According to some embodiments of the composite material of the present invention, preferably, the homopolypropylene has a crystallinity of greater than 70% and an isotacticity of greater than 97.5%.
According to some embodiments of the composite material of the present invention, preferably, the comonomer of the block copolymer polypropylene is ethylene, and the content of the ethylene monomer repeating unit is 5-16% by mass.
According to some embodiments of the composite material of the present invention, preferably, the comonomer of the random copolymerized polypropylene is ethylene and/or butylene, and the content of ethylene and/or butylene monomer repeating units is 0.5-5% by mass.
According to some embodiments of the composite of the present invention, preferably, the ultra low densityThe linear low density polyethylene has a density of 0.905 to 0.912g/cm 3 。
According to some embodiments of the composite material of the present invention, the melt index at 190 ℃ and 2.16kg is preferably 0.1-2.0 g/10 min. The test method is determined according to the national standard GB/T3682.1-2018.
According to some embodiments of the composite material of the present invention, preferably, the antioxidant is selected from at least one of antioxidant 1010 (pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate), antioxidant 168 (tris [2, 4-di-tert-butylphenyl ] phosphite), antioxidant DSTP (stearyl thiodipropionate), and antioxidant 1076 (n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate).
According to some embodiments of the composite material of the present invention, preferably, the antioxidant comprises antioxidant 1010, antioxidant 168 and antioxidant DSTP.
According to some embodiments of the composite material, the mass ratio of the antioxidant 1010 to the antioxidant 168 to the antioxidant DSTP is preferably 1:1 to 10.
According to some embodiments of the composite material of the present invention, preferably, the nucleating agent is HPN-715 (hydroxybis [2,4,8, 10-tetrakis (1, 1-dimethylethyl) -6- (hydroxyko) -12H-dibenzo [ d, g ] [1,3,2] dioxaphosphorinane-6-oxo ] aluminum). HPN-715 is commercially available.
According to some embodiments of the composite material of the present invention, preferably, the light diffusing agent is an inorganic light diffusing agent, and more preferably, the light diffusing agent is nano barium sulfate and/or nano calcium carbonate.
According to some embodiments of the composite material of the present invention, the other additives may be one or more of a variety of processing aids, odor absorbers, and various lipid lubricants as deemed desirable by those skilled in the art. Such as but not limited to CAST (calcium stearate) and/or GMS (glycerol monostearate).
The second aspect of the present invention provides a preparation method of the polypropylene composite material, comprising:
(1) mixing polypropylene resin, nucleating agent, light diffusing agent, antioxidant, other auxiliary agents and optional ultra-low density linear low density polyethylene at high speed to obtain a mixed raw material;
(2) and carrying out melt extrusion, bracing, cooling, granulation and material drying treatment on the mixed raw materials in sequence.
According to some embodiments of the method of manufacturing of the present invention, the conditions of the high speed mixing include: the speed is 600-2000 r/min, and the mixing time is 5-10 min.
According to some embodiments of the preparation method of the present invention, the rotation speed of the screw of the extruder during extrusion is 60 to 600 r/min. The temperature of the extruder from the feed to the head was set as: 190-200 ℃, 195-205 ℃, 200-210 ℃, 205-215 ℃, 200-210 ℃, 195-205 ℃, 190-200 ℃ and 185-195 ℃.
The methods and apparatus for melt extrusion, ribbing, cooling, pelletizing and torrefaction processes according to some embodiments of the manufacturing process described herein may be conventional in the art.
In a third aspect, the present invention provides the use of the polypropylene composite material or the preparation method described above. For example in the automotive field.
The invention has the beneficial effects that:
(1) the polypropylene composite material disclosed by the invention has the advantages of low gloss, mechanical property, impact resistance, rigidity, bending modulus and lower shrinkage rate, and has a wide application prospect in the field of automotive upholstery.
(2) The preparation method of the polypropylene composite material is simple and has low production cost.
Detailed Description
In order that the present invention may be more readily understood, the following detailed description of the invention is given by way of example only, and is not intended to limit the scope of the invention.
The raw materials used in the examples and comparative examples:
(1) the polypropylene is homopolymerized polypropylene produced by Tianjin corporation of China petrochemical industry, and is sold as PPH-CM01, the melt flow rate is 0.7g/10min (the test conditions are 230 ℃, 2.16kg and the national standard GB/T3682.1-2018), the crystallinity is more than or equal to 75 percent, and the isotacticity is more than or equal to 98 percent.
(2) The ultra-low density linear low density polyethylene is TJVL-0505 produced by Tianjin corporation of China petrochemical, the melt flow rate is 0.5g/10min (test conditions: 190 ℃, 2.16kg, national standard GB/T3682.1-2018), and the density is 0.905g/cm 3 。
(3) The nucleating agent was commercially available Hyperform HPN-715.
The test method is as follows:
(1) the flexural modulus was tested in accordance with the national standard GB/T9341-2008.
(2) The impact strength of the notch of the simply supported beam is tested according to the national standard GB/T1043.1-2008.
(3) Gloss was measured according to ISO2813 at a test angle of 20 °.
(4) The transverse and longitudinal shrinkage was measured according to the national standard GB/T1643.2-2004.
[ example 1 ]
Mixing polypropylene resin, nucleating agent, light diffusing agent, antioxidant, other auxiliary agents and ultralow-density linear low-density polyethylene at high speed for 5min at 600r/min and 5min at 2000r/min to obtain uniformly mixed raw materials;
(2) carrying out melt extrusion, bracing, cooling, granulation and material drying treatment on the mixed raw materials in sequence, wherein the rotating speed of an extruder screw is 200r/min, and the temperature of the extruder from feeding to a machine head is set as follows: 195 deg.C, 200 deg.C, 205 deg.C, 210 deg.C, 205 deg.C, 200 deg.C, 195 deg.C, 190 deg.C.
[ examples 2 to 9 ] and [ comparative examples 1 to 4 ]
The procedure of example 1 was followed except that different components or amounts were used, as specified in Table 1.
The components of the examples in table 1 are in mass percent.
TABLE 2 Performance test results of the polypropylene composites of examples 1 to 9 and comparative examples 1 to 4
From the test data results of the examples and the comparative examples in table 2, it can be found that the polypropylene composite materials of the present invention have the advantages of low gloss, high rigidity, high impact resistance, low shrinkage, good mechanical properties, especially good low-temperature toughness, and can meet the requirements of high performance and low gloss of the vehicle parts, as can be known from examples 1 to 9 and comparative examples 1 to 4.
What has been described above is merely a preferred example of the present invention. It should be noted that other equivalent variations and modifications can be made by those skilled in the art based on the technical teaching provided by the present invention, and the protection scope of the present invention should be considered.
Claims (10)
1. A polypropylene composite comprising the following components or the reaction product of the following components in mass percent:
2. the polypropylene composite material according to claim 1, wherein the mass percentages of the substances are as follows:
3. the polypropylene composite material according to claim 1 or 2, wherein the polypropylene resin has a melt index of 0.1-2.0 g/10min at 230 ℃ and 2.16 kg.
4. The polypropylene composite according to any one of claims 1 to 3, wherein the polypropylene resin is at least one selected from the group consisting of homo polypropylene, random co-polypropylene and block co-polypropylene;
preferably, the crystallinity of the homopolymerized polypropylene is more than 70 percent, and the isotacticity is more than 97.5 percent;
preferably, the comonomer of the block copolymerization polypropylene is ethylene, and the mass content of the ethylene monomer repeating unit is 5-16%;
preferably, the comonomer of the random copolymerization polypropylene is ethylene and/or butylene, and the mass content of the ethylene and/or butylene monomer repeating units is 0.5-5%.
5. The polypropylene composite according to any one of claims 1 to 4, wherein the ultra low density linear low density polyethylene has a density of 0.905 to 0.912g/cm 3 And/or the melt index at 190 ℃ under the condition of 2.16kg is 0.1-2.0 g/10 min.
6. The polypropylene composite according to any one of claims 1 to 5, wherein the antioxidant is selected from at least one of antioxidant 1010, antioxidant 168, antioxidant DSTP and antioxidant 1076;
preferably, the antioxidant comprises antioxidant 1010, antioxidant 168 and antioxidant DSTP;
more preferably, the mass ratio of the antioxidant 1010 to the antioxidant 168 to the antioxidant DSTP is 1: 1-10.
7. The polypropylene composite according to any one of claims 1 to 6, wherein the nucleating agent is HPN-715, and/or
The light diffusion agent is an inorganic light diffusion agent, and is preferably nano barium sulfate and/or nano calcium carbonate.
8. A process for the preparation of a polypropylene composite according to any one of claims 1 to 7 comprising:
(1) mixing polypropylene resin, nucleating agent, light diffusing agent, antioxidant, other auxiliary agents and optional ultra-low density linear low density polyethylene at high speed to obtain a mixed raw material;
(2) and carrying out melt extrusion, bracing, cooling, granulation and material drying treatment on the mixed raw materials in sequence.
9. The method of claim 8, wherein the conditions of high speed mixing comprise: the speed is 600-2000 r/min, and the mixing time is 5-10 min; and/or the presence of a gas in the gas,
the rotating speed range of a screw of the extruder is 60-600 r/min during extrusion, and the temperature of the extruder from feeding to a machine head is set as follows: 190-200 ℃, 195-205 ℃, 200-210 ℃, 205-215 ℃, 200-210 ℃, 195-205 ℃, 190-200 ℃ and 185-195 ℃.
10. Use of the polypropylene composite according to any one of claims 1 to 7 or the process according to claim 8 or 9.
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| CN202210368577.2A CN114989526A (en) | 2022-04-08 | 2022-04-08 | Polypropylene composite material and preparation method and application thereof |
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| CN202210368577.2A CN114989526A (en) | 2022-04-08 | 2022-04-08 | Polypropylene composite material and preparation method and application thereof |
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| CN101759919A (en) * | 2008-12-26 | 2010-06-30 | 上海普利特复合材料股份有限公司 | Low-luster polypropylene composite material and preparation method thereof |
| CN102108175A (en) * | 2009-12-25 | 2011-06-29 | 上海普利特复合材料股份有限公司 | Low-gloss high-rigidity polypropylene compound material and preparation method thereof |
| CN102532774A (en) * | 2010-12-16 | 2012-07-04 | 上海普利特复合材料股份有限公司 | Low-gloss polypropylene composite material and preparation method thereof |
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